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Subject: Re: Regression in 5.18.3 from "xhci: Set HCD flag to defer primary
 roothub registration"
From:   Christian Hewitt <christianshewitt@gmail.com>
In-Reply-To: <YqRFH2i3s/jL28ZG@kroah.com>
Date:   Sat, 11 Jun 2022 18:18:08 +0400
Cc:     Kishon Vijay Abraham I <kishon@ti.com>,
        Mathias Nyman <mathias.nyman@linux.intel.com>,
        Chris Chiu <chris.chiu@canonical.com>,
        linux-usb@vger.kernel.org,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@lists.infradead.org>,
        stable@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Neil Armstrong <narmstrong@baylibre.com>
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Message-Id: <AF1EDC5C-7304-48F4-A981-CD8DDBFAB5EE@gmail.com>
References: <743F7369-2794-4189-8891-5DA62E4B62DA@gmail.com>
 <YqRFH2i3s/jL28ZG@kroah.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Precedence: bulk


> On 11 Jun 2022, at 11:32 am, Greg Kroah-Hartman =
<gregkh@linuxfoundation.org> wrote:
>=20
> On Sat, Jun 11, 2022 at 10:49:23AM +0400, Christian Hewitt wrote:
>> Commit 6c64a664e1cff339ec698d803fa8cbb9af5d95ce =E2=80=9Cxhci: Set =
HCD flag to defer
>> primary roothub registration=E2=80=9D added for Linux 5.18.3 caused a =
regression on
>> some Amlogic S912 devices (original user forum report with an Android =
TV box
>> and confirmed with a Khadas VIM2 board). I do not see issues with =
older S905
>> (WeTeK Play2) or newer S922X (Odroid N2+) devices running the same =
kernel.
>> There are no kernel splats or error messages but lsusb shows no =
output and
>> nothing works. Simple revert restores the previous good working =
behaviour.
>>=20
>> dmesg with commit http://ix.io/3ZTv
>> dmesg with revert http://ix.io/3ZTw
>>=20
>> I=E2=80=99m not a coder so will need to be fed instructions to assist =
with debugging
>> the issue further if you don't have access to an Amlogic S912 device. =
I can
>> share devices online for remote poking around if needed.
>=20
> Does 5.19-rc1 also have this problem?

No, and in the process of fixing up my normal patchset to test 5.19-rc1 =
I=E2=80=99ve
spotted some other USB patches picked from lists. Once dropped from =
5.18.3 usb
works again. So my bad, sorry for the noise!

Christian=